Williams has become the final team to show off its 2013 Grand Prix challenger after it took the covers off the FW35 this morning at the Circuit de Catalunya in Barcelona.

After running a modified version of last year’s car in the opening pre-season test session at Jerez earlier this month, the Renault-powered FW35 will get just eight days of running before next month’s Australian Grand Prix.

While the stability in the sport’s technical regulations have meant that the FW35 should be a logical evolution of the race-winning FW34, around 80 per cent of the new car’s design is brand new.

The changes are obvious throughout. The FW35 sport’s a Ferrari F138-style ‘sawn-off’ nose and heavily modified front wing, as well as sharply-cut sidepods and a more tapered rear end. The FW35 also sports new internals, including a new gearbox, radiators and floor, as well as sporting a Coandă effect exhaust layout.

“Given the rule stability over the winter, I’m pleased with the gains that we’ve been able to make with this car,” Williams’ technical director Mike Coughlan said.

“It’s a better, more refined Formula 1 car than the FW34 and I think everyone involved in the project can feel proud of the work they’ve done.”

“A group of talented people with good imagination and plenty of courage have been working together to build the Williams Renault FW35. We will have to wait until Australia to truly see what we have, but we believe it is step forward from last year’s car which was also a very competitive vehicle,” team founder Sir Frank Williams added.

“Williams has been at the top many times over the last 30 years. It’s the nature of the sport to have ups and downs, but when we are down we always fight our way back. I’m hoping that with the current team we have in place, our new FW35, the combined talent of [our drivers], and the continued support from our partners; we will be in a position to challenge the very best.”

Williams also used the announcement to confirm its renewed sponsorship deal with recruitment firm Randstad for the eighth consecutive season, while also announcing a new agreement with the Experian credit information services company.

That being said, the FW35 sports plenty of available advertising space on its panels, no doubt indicating the team is hopeful that its on-track success might help it generate additional blue-chip revenue.